#include <iostream>
#include <cstring>
using namespace std;
const int N = 20;
char g[N][N];
bool col[N],dg[N],udg[N];
int n;
void dfs(int u)
{
    if(u == n)
    {
        for(int i = 0;i < n;i++)
        {
            cout << g[i] << endl;
        }
        puts("");
        return;
    }
    for(int i = 0;i < n;i++)
    {
        if(!col[i] && !dg[u + i] && !udg[n - u + i])
        {
            g[u][i] = 'Q';
            col[i] = dg[u + i] = udg[n - u + i] = true;
            dfs(u + 1);
            col[i] = dg[u + i] = udg[n - u + i] = false;
            g[u][i] = '.';
        }
    }
}
int main()
{
    cin >> n;
    for(int i = 0;i < n;i++)
    {
        for(int j = 0;j < n;j++)
        {
            g[i][j] = '.';
        }
    }
    dfs(0);
    return 0;
}